This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 1 | 12 |
| 2 | 120 |
| 3 | 312 |
| 4 | 612 |
| 5 | 912 |
| 6 | 1128 |
| 7 | 1200 |
| 8 | 1212 |
| 9 | 1224 |
| 10 | 1236 |
| 11 | 1248 |
| 12 | 1260 |
| 13 | 1272 |
| 14 | 1284 |
| 15 | 1296 |
| 16 | 1512 |
| 17 | 1812 |
| 18 | 2112 |
| 19 | 2124 |
| 20 | 2412 |
| 21 | 2712 |
| 22 | 3012 |
| 23 | 3120 |
| 24 | 3312 |
| 25 | 3612 |
| 26 | 3912 |
| 27 | 4128 |
| 28 | 4212 |
| 29 | 4512 |
| 30 | 4812 |
| 31 | 5112 |
| 32 | 5124 |
| 33 | 5412 |
| 34 | 5712 |
| 35 | 6012 |
| 36 | 6120 |
| 37 | 6312 |
| 38 | 6612 |
| 39 | 6912 |
| 40 | 7128 |
| 41 | 7212 |
| 42 | 7512 |
| 43 | 7812 |